Oil-circulation signal



Y 1 573,371 Feb' 16 1926' A. BLOCH OIL CIRCULATION SIGNAL Filed April 19. 1921 l 2 ll Il 4- 3/ ffrmf-*Z i I Il Z/ Z3 Z4 /cnvemoz m. mwvvvvv Parenteel Feb. 1e, 192e.

uNrran' STATES ARTHUR BLOCH, F PHILADELPHIA, ENNSYLVANI.

orL-cIRcULa'rron stenen.

Application filed April 19, 1921. Serial No. 452,736.

To all rb om'- may concern.'

Be it known that I, ARTHUR BLoorI, a citizen of the United States, residing at Philadelphia. in the county of Philadelphia and StateA of Pennsylvania, haveA invented certain new and useful Improvements in Oil-Circulation Signals, of which the following is a specification. Y

My invention has-for its objects to' provide a simple and etlicient signal device for oil distributing or other circulating systems which vwill be relatively inexpensive and easily installed and which can be relied upon to give a definite warning signal when some lfailure occurs in the circulating system.

The invention involves a number of novel features of construction, combinations and arrangements of parts as will be clear from the following specification which to be read in conjunction with the drawing accompanying and formirrgaJ part of the same and wherein the invention is illustrated embodied in a concrete practical form.

Figres l and 2 in the drawing referred to are central sectional views of the device, the lirst showing therelative position of the' ---parts when there is pressure in the oil circulating system, and the latter illustrating operation of the parts when the pressure fails.

Figures 3 and 4 are plan and side views respectively of the pressure actuated cir-r cuit breaker. i

lfn the present embodiment of the invention the entire apparatus is carried by and housed within a casing or shell 5 having an outstanding ange 6 by which the device may be located'in an instrument board or the like. This casing is shown as divided by a partition 7 into a lamp housing 8. and a circuit breaker chamber 9.

Within the lamp housing, there is provided a suitable socket 10 for the lamp 11 and this end of the casing is shown as closed by a glass or lens 12 secured by a screw flange 13, a suitable gasketl 14 being interi posed between the glass and the end of the housing.

The chamber in the other end of the casing is closed by a plug 15 having a flange screw threaded at 16 to lit the interiorly screw threaded lower end of the casing. This plug has an inlet 17 for the oil or other circulating-pipe 18 and carries a pressurepactuated element shown in the form of a piston or plunger 19 operating in a cylilndrical bore 20 in the upper face of the p ug.

This pressure element is shown as operating directly on the arm 21 of the circuit breaker which is pivoted on the upper face of the plug at 22 and carries at its free end a contact 23 for engagement with a relatively stationary contact 241 supported in an in' sulating bushing 25.

The contact carryinglever 21 is provided at its upper face with n eonducting strip 26 extending from the contact 23 to the end of a coiled spring 2'? which seats within and forces the metallic contact thimble 28 up into engagement with the center contact 29 of the lamp. 'This Contact sleeve or thimble operates within an insulating bushing30 in the horizontal partition 7. Y

The lamp is suitably connected in circuit usually by means of a wire extended from the insulated contact 24 to a battery or other source of energy, the circuit being com,- pleted by grounding the metallic casing andthe other side of the battery. `When suiiicient pressure is present in the oil circulating system, the Contact lever 21 will be lifted by the pressure operated element so as to break the lamp circuit across the contacts 28, 24. lli/'hen for ,any reason the pressure :tails or falls below a predetermined fo'rcetbeV pressure operated element will drop loack as in Figure 2 and allow the spring 27 to torce back the contact lever and bring the contacts `into engagement. This will close the lamp circuit and thereby givea visual signal, indicating that the pressure has failed.

The construction disclosed is' particularly desirable in that the device may be easily installed, it simply being necessary to provide a cylindrical opening large enough to receive the barrel or casing and to then lit the casing within such opening.

The plug in the lower end of the device may be easily removed at any time by simply unscrewing it. The spring 27, it will be observed, serves dual'nfunctions that operates to press the center lamp contact end of the coiled spring and centrally located stud 3l fitting theY lower serving thereby to hold the spring centralized during the turning of the plug.

AIt will be understood that the structure may be modiied in various respects without departure from the truespirit-and scope ot the invention as herein defined and claimed. For instance, if found desirable, the relatively iXed Contact 2a might be provided at the outside of the plug with a binding postor suitable terminal device tor the attachment of the circuit wire.

That I claim is:

l. In an apparatus of the character disclosed, a casing, a 'support detachably mounted on said casing, a lever pivotcd on said support, a Contact carried by said lever, a relatively stationary contact on the support for engagement by the levercarried contact,'a pressure actuated element on the support beneath the lever for operating the lever in one-direction, a spring bearing on said lever and adapted to move the same in the opposite direction, a signal element, means mounting said element in said casing, andmeans forming an electrical connection between said lever-carried-contact and said signal element lincluding a spring bearing on said lever and adapted to move it in the opposite direction.

2. In ap aratus of the character disclosed, a casing aving a partition dividing the same into a signal and a switch chamber, a lamp socket on said partition and extending into the signal chamber, a lamp contact operating in the partition and in contact with said socket, a relatively movable and a stationary switch contact in the switch chamber, a spring engaged between the contact plunger and the relatively mova- 'ble switch member for operating said plunger and said movable switch member and a'pressure actuated element operatively engage-able with the movable switch member.

3. In apparatus of the character disclosed,l

a casing having a partition dividing the same into a. signal and a switch chamber, a lamp socket on said' partition and extending into the signal chamber, a lamp Contact plunger operating in the partition and in contact with said socket, a relatively1 movable and a stationary switch member lin the switch chamber, a spring engaged between the contact plunger and the relativel)v movable switch member for operating said plunger and said movable switch member, a pressure actuated clement operatively engageable with the movable switch member, said mov: ble switch member including a pivoted switch lever carrying a contact, a conducting strip connected with said contact and a stud carried by said strip and engaging one end ot the spring aforesaid.

4. In apparatus ot' the character disclosed a .casing having a partition dividing the saine into a signal and a switch chamber, a lamp socket on said partition and extending into the signal chamber, a lamp contact plunger operating in the .partition and in contact with said socket, a relatively movaf ble and a stationary switch contact in the switch chamber, a spring engaged between the contact plunger and the relatively movable switch member for operating said plunger and said movable switch member and a pressure actuated element operatively engageable with the movable switch member, the switch contacts and the pressure actuated element being mounted on. a supporting member having a screw threaded connectionwith the casing and the movable switch element having a centrally located stud for guiding the end ot` the spring.

In testimony whereof I aflix my signature.

ARTHUR BLOCH. 

